North Pacific storm

22°18.5′N 179°21.7′E

Waves left about 4 Oct 07:52Z, ± 4 h

Placed by 4 buoys, whose own placements lie within 331 nmi of it

Its swell was last measured at 46215 (Diablo Canyon, CA) on 9 Oct 08:00Z; the replay ends there.

Each buoy places the storm from how its swell's period shortened as it arrived: the longest waves travel fastest. Fronts are drawn at deep-water group speeds along great circles, and stop at land. How it is worked out